Dismantling The Pump; Checking Of Components - Grundfos MP 1 Bedienungsanleitung

Fig. 16 Pump components
When servicing the MP 1 sampling pump, note that the pumped
liquid is often unknown. Therefore, the necessary precautionary
measures must be taken in accordance with local regulations.
Warning
All work on the electric parts of the MP 1
sampling pump system must be carried out by a
qualified service engineer.
If the motor, motor cable, converter or converter cable is
defective, please contact your nearest Grundfos distributor.
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10.2 Dismantling the pump

Procedure (see fig. 16):
1. Place the pump in upright position with the discharge port
uppermost.
2. If the pump is fitted with hose and fittings, remove these.
3. Slacken and remove the screw (pos. 215a).
4. Remove the strainer (pos. 215).
5. Screw (right-hand thread) the pump housing (pos. 201a) off
the suction interconnector on the motor (pos. 1).
6. Pull the pump housing and the wear parts including impellers
(pos. 200) off the motor shaft. Push the wear parts including
impellers out of the pump housing from the discharge side.
7. Dismantle the wear parts including impellers (pos. 200).
8. Clean the holes in the suction interconnector.
9. Clean and check all parts. See section 10.3 Checking of
components.
For assembly of the pump, see section 10.4 Assembling the
pump.

10.3 Checking of components

When the pump has been dismantled, all parts must be cleaned
and checked for fractures, corrosion and wear.
Apart from the visual inspection, it is necessary to measure the
following parts:
Fig. 17 Seal (pos. 207) – A = Min. 1.5 mm
Fig. 18 Impeller (pos. 213) – no measurable wear
Fig. 19 Washer (pos. 285) – A = Min. 1.0 mm
Fig. 20 Guide vanes (pos. 232) – no measurable wear